Why would it have? You can't use the results Gohan had during his other moments of training as evidence for his gains in this situation, as the two situations are very different. He has no high-strength training partners (until taking Trunks under his wing, he has no training partners whatsoever) and no special environment for training boosts (no gravity chamber, no Room of Spirit and Time, etc). He only has the basics of training from his time with Piccolo prior to Vegeta and Nappa's arrival for how to train at all, and doesn't have anywhere near the training experience his present counterpart has as a result.Captain Strawberry wrote:
over a decade is enough for Gohan to turn ssj2 and wipe out the androids.
Lastly, he would always have to be under constant visual and auditory guard for #17 and #18 during any kind of training he did. Because he can't sense them, he'd always have to be on the watch for them if he were training out in the open, thus meaning he'd not be able to readily focus on his training for optimal results.
All this points to it making perfect sense that Gohan, in Trunks' timeline, just never reached anywhere near what present-time Gohan did, so him not having Ssj2 or otherwise not being strong enough to take them on is perfectly reasonable to me.




